Crane-door-operating mechanism



lama 5, R923. HASZW? F. w. HEISLER vCRANE DOOR OPERATING MECHANISM Filed Oct. 8, 1919 4 Sheets-Sheet 1 FIGA:

' Junie 5, 1923. L457$7 F. w. HEISLER CRANE DOOR OPERATING MECHANISM Filed Oct. 8. 1919 4 Sheets-Sheet 2 -FIG. 2.

F. W. HEISLER CRANE DOOR OPERATING MECHANISM June 5, 31923.

Filed Oct. 8. 1919 4 Sheets-Sheet 5 WIT/158858:

rme5,1923. 1.457%? F. W. HElSLER CRANE DOOR OPERATING MECHANISM Filed Oct. 8, 1919 I 4 Sheets-Sheet 4 aw Q 12 rm? g3 WW3 a. I 3 u I t v x l Q Q Q BEL 1% x WITNESSES: I

Patented June 5, i923.

FREDERICK VII/I. I-IEISLER, 0F SCI-IENECTADY, NEW YORK.

CRANE-DOOR-OZPEBATING MECHANISM.

Application filed October 8, 1919. Serial No. 329,393.

ToaZZ whom it may canoe m:

Be it known that I, FREDERICK W'. Hars- LER, of Schenectady, in the county of Schenectady and State of New York, have invented a certain new and useful Improvement in Crane-Door-Operating Mechanism, of which improvement the following is a specification.

My invention relates to means for operating the'doors controlling the openings in a building through which travelling cranes, operating normally on runways located within the-building, are traversed, when required, between'said runways and extended runways on the exterior of the building. The'objeetof my invention is to provide a simple, effective, and readily applicable mechanism, whereby doors of the character above specified may, with their operating mechanism, be constructed with a reduction of weight and cost; be held securely locked, in either open or closed position; be effectively braced to resist high wind pressure; and be prevented from distortion and cramping; so as to be readily opened or closed during'a' storm, or under comparatively high Wind pressure.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings: Figure 1 is a view,in elevation, of a crane door, in connection with which my invention is applied, as seen from the interior of the build ing in which it is installed; Fig. 2, a ver tical'transverse section through the wall of the building in which the door operates, and a side view, in elevation, of the operating-mechanism'; Fig. 3, a similar view, illustrating astructural modification; Fig. 4, a view illustrating the application of an electric driving motor; Fig. 5, a view, similar, to Fig. 2, but illustrating another structural modification; and, Fig. 6, a View, in elevation, ofan operating cylinder and its connections.

Referring descriptively to the specific embodiment. ofimy' invention which is herein exemplified, it is illustrated as applied in connection with a crane door, 1, which is hinged, at its top, by pins or pivots, 2, to one of-the walls,-3, of a building, so as to swingina vertical plane, and controls an opening or doorway, 8 in said wall through which a travelling crane, 4, which, in opera tion, normally traverses on a runway, 5, in the'building, may,.'as'from time to time desired, be moved from said runway, to an extended runway, 5, on the exterior of the building, and returned, when required, to

the interior runway, 5. An auxiliary wicket door, 1 controls a doorway, 3 in the wall, located belowthe main doorway, 3 and 0t sutficient size to permit the passage of the operators cage, 4

Door lifting links, 6, are coupled, at their. lower ends, by pins, 6 to the crane door, 1, adjacent to its bottom, and the upper ends of said links are coupled, by pins, 6, to door lifting arms, 7, fixed upon an operating shaft, 8, journalled in bearings'on girdersf,'- 8 above the'doorway, 3. The lifting arms are, as shown in Figs. 1 and 3, set'on the operating shaft at such an angle to llOIlf' zontal plane, that the axes of thelifting link pivots, 6 and 6 stand in line with the axis of the operating shaft, when the dooris closed, thereby locking it in position, which, in the case of large runway -doors','when-sub -jected to high wind pressure,-is ofteii'of' much importance. A weight arm, 9, is fixed upon, and projects upwardly from, the"op-' erating shaft, 8, and a counterbalance weight, 10, of about the sameyveight asthe combined weights of crane 'doorf'and wicket door, is suspended from the weightarm',"by links, 8 8*. As shown inFig. 2, the weight arm, 9, is fixed on the operating shaft in such relation to the lifting arm s,as'to stand in nearlyvertical position when the doors are closed, in which period the momentof the counterbalance weight is at the "minimum, and, as the door is opened, it graduallyincreases until it reaches the maximum whenthe doors are fully opened for the passage of the travelling crane and operators cab; The modification of the normal position of the weight arm and its connection to the counterbalance'weight which is illustrated in Fig. 5, is similarly operative to the disposition of these 'mei-nberswhich is above we described, the structural difference being that, in :this case, the weight arm, 9, stands in nearly a horizontal position when the doors are closed, and the counterbalance weight, 10, is connected to it by a cable, 8, passing around a guide sheave, 8, instead ofby the links, 8, 8 The counterweight may be located'in any position required to meet conditions of limitationof "spacenear the doors, and the weight arm, maybe located in any desired planein the length of the operating shaftr The angular position of the counterweight arm, relatively to the V '1 lifting arm, is determined by the counterweight effect which it is desired to produce when the doors are in position. requiring the maximum of counterbalance, and to produce the minimum counterbalance effect when the doors are closed.

Movement is impartedto the operating shaft, 8, to open and close the doors,by a

fluid pressure motor cylinder, 11, in which is fitted a piston, 11, fixed on a piston rod, 111?,1I1O111VG fluid being admitted to, and

, exhausted from, the motor cylinder by a ,block or hearing 13, for

of which is secured to a fixedsupport, 15.-

Afterleaving the sheave, 14, the cable, 15, isconnected to another cable 16, and the oables, ;15 and 16,-are reevedon sheaves, 17, 17, and, extending upwardly,pass around sheaves, 18,18, and are secured to suspension arms, 1", on the auxiliary wicket door,

1. The traverse of the door, 1 will be twice that of the piston of the motor cylinder,

- ping.

over guides sheaves, 23, E24, and 25, and isby reason of the, provision of the sheave, 14, and its relative-traverse may, if desired, be further; increased byt-he application of another sheave,

tor cylinder piston, reeves over sheaves, 20

and 21, and several times around the winding drum, 22,

on the operating shaft, 8, to which drum it isclamped toprevent slip- From the winding drum,.22, it passes connected to the block, 13, carried on the end of the piston rod further from that to which it is first connected: Themovement of the piston of the motor cylinder is transapproximately 180 degrees to openv both mitted to the operating shaft by the cable, 19, inmu'ch the samemanner as in the op- 'eration ofa fiddlehow drill, except that the operating shaft swings through an arc of doors wide. By reversing the movement of the motor cylinder piston, the movements of the operating shaft and doors are coincidently reversed.

in. the -modification shown in Fig. 3,

i there is substituted for the intermediate cables and sheaves above described, a rack, 26, which is secured on the piston rod of the motorcylinder and engages a segment gear,

27, on the'operatingshaft, 8. As shown in Fig. 4, the operating shaft is actuated by an electric motor, 28, which, through gears,

I The advantage of this feature of my improvement is that of providing any The crane door actuating cable, 19, which is connected tothe opposite end of the mo-' 29, 30, rotate a worm shaft, 31, carrying a worm, 32, which engages a worm wheel segment, 33, fixed on the operating shaft.

As indicated in .Fig. 6, the control valve, 12, of ally operable by a hand lever, 12, and may be of any suitable known type adapted to admit motive fluid to one end of the motor cylinder, and coincidently exhaust it from the opposite end. The piston, 11 of the motor cylinder, is cushioned, a predetermined time before the end of itsv stroke in either direction, by'eXha-ust closure valves, 34 and 34, controlling the exhaust from opposite ends of the cylinder, respectively, said valve being slidingly coupled by rods, 34 and 34, respectively, to a guide bracket, 34, formed on the pulley block, 13. The rod, 34, carries a tappet, 34, and a spring,

34, and the rod, 34, carries a tappet, 34,

- and a spring, 34

- When the operating lever, 12?,0f the con-.

the operatingcylinder, 11, is manutrol valve, 12, ismoved towards the right,

near the completion of the stroke to the right, the guide bracket, 34 compresses the spring,34 and close the exhaust from the right hand end-of the cylinder, by actuating the closure valve,

34, for the purpose of. trapping fluid and thereby cushionin the piston at the close of the stroke. bleeder ex aust valves, 35, are interposed between the corresponding exhaust valves,

'34 and 34 and the control valve, for the purpose .of slowly exhausting the. trapped cushioningfluid, thereby permitting the pis ton to complete its stroke. /Vhen moving toward the right at the completion of. a

stroke, the guide bracket engages the tap pet, 34, which 'actuates the valve, '34, ."to permit a return, or movement toward the left, of

the piston, immediately after moving the lever, 12, in that direction, to the position shown in Fig- 6, the other half of the cycle of movements being similarly completed. I

cure by Lettersv Patent 1. The combination of a building having a crane doorway formed in the upper 'por-itron OflllS vertical walls, craneways adapted lower saiddoor and lock itin its upper open mall I its , 1 claim. as my invention and desireto sea crane door hinged at its upper secposition to permit safe passage of the crane and to form an effective lock and wind bracing for the lower section of the crane door when in its closed position, a lower doorway adapted to permit the passage of a crane cage, an auxiliary door controlling the lower doorway, and means coupling said doors in a manner adapted to open or close them simultaneously.

2. The combination of a building having a crane doorway formed in the upper section of its vertical walls, cranoways adapted to support a crane passing through the doorway, a lower doorway adapted to permit passage of a crane cage, a crane door adapted to control the crane doorway by swinging to, or from, a closed vertical position from, or to, its horizontal open position, where it is disposed at a sutfioient distance above the craneway to permit free passage of the crane, means for coupling an auxiliary door to the crane door in a manner adapted to control said lower doorway, and means for transmitting power to actuate said doors.

3. The combination of a building .wall having an upper doorway adapted to admit a traveling crane and a lower doorway adapted to admit a crane operating cage, a main door controlling the upper doorway, an auxiliary or wicket door controlling the lower doorway, crane runways extending oppositely from the upper doorway for the traverse of a traveling crane, an operating shaft, means for rotating the shaft about its axis, means coupling the operating shaft and main door, and means coupling the movement imparting means to the auxiliary or wicket door.

FREDERICK WM. HEISLER. Witnesses:

J. HOWARD WAGAR,

E. I. SCHAUBER. 

